Body A of mass 2 kg and another body B of mass 4 kg and of same material are kept in the same sunshine for some interval of time. If the rise in temperature is equal for both the bodies, then which one among the following in this regard is correct?
When a solid object is immersed in water, there is a loss in its weight. This loss is
An electric lamp of 100 watt is used for 10 hours per day. The ‘units’of energy consumed in one day by the lamp is
A stable nucleus (light with A < 10) has
Kilowatt-hour is the unit of
Which one among the following is used to make periscope?
